Table 2 Estimate and 95 % posterior probability interval (PPI) of sensitivity (Se) and specificity (Sp) of PCR and bacteriological culture (BC) at PCR Ct-value cut-off 32, 34, 37 and 39, as tests for diagnosing intramammary infections by S. aureus
| Â | PCR | Bacteriological culture | ||||||
|---|---|---|---|---|---|---|---|---|
Ct-value cut-off PCR | Se | 95 % PPI | Sp | 95 % PPI | Se | 95 % PPI | Sp | 95 % PPI |
≤ 32 | 0.61 | 0.36 ; 0.97 | 0.99 | 0.95 ; 0.99 | 0.94 | 0.76 ; 0.99 | 0.90 | 0.79 ; 0.99 |
≤ 34 | 0.81 | 0.61 ; 0.99 | 0.96 | 0.90 ; 0.99 | 0.88 | 0.70 ; 0.99 | 0.94 | 0.86 ; 0.99 |
≤ 37 | 0.93 | 0.80 ; 0.99 | 0.95 | 0.85 ; 0.99 | 0.83 | 0.66 ; 0.99 | 0.97 | 0.91 ; 0.99 |
≤ 39 | 0.93 | 0.80 ; 0.99 | 0.93 | 0.82 ; 0.99 | 0.78 | 0.60 ; 0.98 | 0.97 | 0.91 ; 0.99 |